How do police choose sobriety checkpoint locations?

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Police generally set up sobriety checkpoints in areas where there are a high number of DUI arrests or alcohol-related accidents. Sobriety checkpoints are most commonly found between the hours of 9 p.m. and 2 a.m. on weekends and holidays, and in areas near bars and other drinking establishments, reports DUICheckPoints.net

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Sobriety checkpoints may also be located near large events, such as concerts and sports games. Police generally announce when and where they intend to place a sobriety checkpoint, according to Nolo.com. Publicity surrounding police presence at checkpoints is believed to serve as a deterrent to drunk drivers. The Governors Highway Association publishes a list detailing each state's policy on sobriety checkpoints and their frequency of operation.